Usually it is not allowed to disable the LMP except in the following two cases. One is when an ASON NE is connected to a traditional NE that is incapable of transparent transmission. The other one is when an ASON NE has an optical interface that does not connect any fiber. In these two cases, you can disable the LMP to release idle resources for a better resource allocation.
If the LMP is disabled, the ASON feature of the corresponding optical interface is disabled, which severely affects ASON services. Hence, disable the LMP only when necessary.
If you need to enable the LMP, choose Enabled.